Add Audio to Video

Combine audio tracks with video files or replace existing audio with our free online tool. Perfect for adding background music, voiceovers, or replacing poor-quality audio in your videos.

How It Works

1. Upload your video file
2. Upload your audio track (music, voiceover, narration)
3. Choose Replace Audio or Mix Audio, then adjust volume and start delay
4. Process and download your merged video

Key Features:

• Add new audio tracks to silent videos
• Replace existing video audio
• Mix multiple audio sources
• Adjust audio volume and timing
• Support for various video and audio formats
• High-quality output preservation

Perfect For:

• Adding background music to videos
• Creating voiceover presentations
• Fixing audio quality issues
• Social media content creation
• Educational video production
• Marketing and promotional videos

Essential tool for content creators, video editors, marketers, and educators who need professional audio integration for their video projects.

Tips for Better Results

• For best compatibility, use MP4 (video) and MP3 or AAC (audio)
• If your music starts too early, increase Audio Start Delay to sync it
• If your video has no original audio, Mix mode behaves like Replace mode

FAQ

Will this reduce video quality? We preserve the original video stream whenever possible and only re-encode audio for reliable playback.

What if my audio is shorter than the video? The audio will automatically loop until the video ends.

What if my audio is longer than the video? The result is trimmed to the video length.